Research on Deformation Reconstruction Technology of Antenna Panel Based on Laser Mapping Method postprint

Abstract: In this paper, a single panel deformation of the main reflector of a large radio telescope is studied and the six degrees of freedom attitude change of robotics is applied to the deformation of the reflector panel of a large radio telescope. A characterization method of panel deformation based on six degrees of freedom deformation of rigid body is proposed. Based on the six-DOF attitude deformation theory of rigid body, an optical reconstruction technique of antenna panel deformation is proposed in this paper. This technology can reconstruct the deformation of the panel quickly and accurately by the spot image presented by the laser unit consolidated on the panel. In this paper, the mapping relationship between laser spot and antenna panel deformation is deeply explored, and the spatial deformation problem of antenna panel is transformed into the laser spot displacement problem in a finite region. And the light spot image of this scheme is studied, and an effective light spot image processing algorithm is provided. It integrates the image difference method and Canny edge detection algorithm, which can effectively solve the problem of traditional Canny algorithm in dealing with small targets. It also uses the high-precision sub-pixel centroid localization algorithm, which can locate light spots at sub-pixel level. It provides a new and reliable image processing method for antenna panel measurement. This study also provides a new idea and method for improving the accuracy and efficiency of antenna panel measurement.